
ABB Miniature Circuit Breakers

ABB miniature circuit breakers are highly renowned for their quality and effectiveness in ensuring electrical safety. These circuit breakers offer a combination of delayed thermal tripping mechanisms and magnetic tripping mechanisms. The thermal tripping mechanism is designed for overload protection, while the magnetic tripping mechanism provides short circuit protection. Together, these two tripping mechanisms offer robust safeguarding for electrical installations in various settings, including industrial applications.
One of the standout features is the range of trip curves available, labeled as B, C, D, K, which allow for customization based on specific requirements. These curves help tailor the circuit breaker's performance to the unique needs of each application. Whether it's safeguarding sensitive electronics or heavy-duty machinery, there's an ABB miniature circuit breaker suitable for most applications.
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More Information about ABB Miniature Circuit Breakers
The ABB miniature circuit breakers are part of the System Pro M Compact series, which is synonymous with time-saving and certified quality. This complete range of breakers is developed to meet worldwide product standards, warranting reliability and top-notch performance in the electrical sector.
If you require additional functionalities, such as an auxiliary contact for signaling or remote control, ABB offers options to meet these specific needs as well. With a focus on electrical circuit protection and electrical safety, ABB miniature circuit breakers are a trusted solution for protecting electrical installations in industrial settings, commercial spaces, and other buildings.
FAQs
Does a delayed thermal tripping mechanism protect against short circuits?
A delayed thermal tripping mechanism is generally not designed to protect against short circuits. Instead, it is typically intended for overload protection.
Trip Curve Basics Part 1
There are two critical elements in miniature circuit beakers.
Bimetal strip
This strip has two dissimilar metals attached to one another. When a prolonged overcurrent occurs, these metals begin to bend. Because the metals are different, the rate at which they bend is different, therefore causing the strip to bend. If this bending occurs long enough, the bending strip will disrupt the electrical contacts inside the breaker, causing it to trip.
Coil or solenoid
The coil or solenoid is designed for larger overcurrent events like a short circuit or lightning strike. When a large overcurrent event occurs, the plunger in the solenoid is actuated, thereby tripping the breaker.
What is a trip curve?
It is both the prolonged overcurrent protection from the bimetal strip and the higher spikes in voltage and current protection from the solenoid that make up the circuit breakers trip curve. How fast or slow these events occur determines the shape of the curve. A trip curve is simply a graphical representation of the expected behavior of a circuit protection device, in this case, a circuit breaker.
This graphical representation looks at two separate pieces of data to provide the information needed to understand when a particular breaker will trip. The first is time, more specifically, the time the circuit breaker experiences a certain amount of overcurrent. The second is the amount of current. In this case, how much more current is passing through the breaker than the protection device is actually rated for.